Bake cookies 20 to 22 minutes or until bottoms are lightly browned. Transfer cookies to wire rack to cool slightly.

Place remaining 1 cup confectioners' sugar in medium bowl. While still warm, gently roll cookies, one at a time, in sugar to coat. Place cookies on wire rack to cool completely. When cool, gently roll cookies in sugar again.

Repeat with remaining dough and sugar. Store cookies in tightly covered container up to 3 weeks.